scholarly journals Optimizing Router Placement of Indoor Wireless Sensor Networks in Smart Buildings for IoT Applications

Sensors ◽  
2020 ◽  
Vol 20 (21) ◽  
pp. 6212
Author(s):  
Mohammed A. Alanezi ◽  
Houssem R. E. H. Bouchekara ◽  
Muhammad S. Javaid
Keyword(s):  
Computer Aided Design ◽  
Wireless Sensor ◽  
Optimal Placement ◽  
Smart Buildings ◽  
Smart Building ◽  
Iot Applications ◽  
Step Procedure ◽  
Optimal Network ◽  
Cad Tool ◽  
Aided Design

Internet of Things (IoT) is characterized by a system of interconnected devices capable of communicating with each other to carry out specific useful tasks. The connection between these devices is ensured by routers distributed in a network. Optimizing the placement of these routers in a distributed wireless sensor network (WSN) in a smart building is a tedious task. Computer-Aided Design (CAD) programs and software can simplify this task since they provide a robust and efficient tool. At the same time, experienced engineers from different backgrounds must play a prominent role in the abovementioned task. Therefore, specialized companies rely on both; a useful CAD tool along with the experience and the flair of a sound expert/engineer to optimally place routers in a WSN. This paper aims to develop a new approach based on the interaction between an efficient CAD tool and an experienced engineer for the optimal placement of routers in smart buildings for IoT applications. The approach follows a step-by-step procedure to weave an optimal network infrastructure, having both automatic and designer-intervention modes. Several case studies have been investigated, and the obtained results show that the developed approach produces a synthesized network with full coverage and a reduced number of routers.

scholarly journals An Efficient Algorithm for Touring n Circles

2018 ◽  
Vol 232 ◽  
pp. 03027
Author(s):  
Yuepeng Ding ◽  
Xiong Xie ◽  
Bo Jiang
Keyword(s):  
Polynomial Time ◽  
Shortest Path ◽  
Computer Aided Design ◽  
Layered Manufacturing ◽  
Wireless Sensor ◽  
Intelligent Algorithm ◽  
Design And Manufacturing ◽  
Depth Study ◽  
Manufacturing Applications ◽  
Aided Design

This paper proposed an intelligent algorithm, which can build the shortest path of the intersecting circle sequences in the plane. The problem is transformed to a corresponding problem of computing the shortest path of three disjoint circles. And it is also an in-depth study of the traversal problem for the disjoint circle sequences. On the basis of the previous work, the algorithms are developed to construct such shortest path in polynomial time of O(kn) where 1≤k≤n under a given computational threshold. Since the algorithm is fully polynomial time consuming, this work can be conducted in layered manufacturing of rapid prototyping, displacement of wireless sensor networks, or other related computer-aided design and manufacturing applications.

A NUMERICAL SIMULATION INVESTIGATION OF THE HYDRODYNAMIC MOTIONS OF A SHIP ADVANCING IN WAVES

2021 ◽  
Vol 156 (A4) ◽  
Author(s):  
D C Lo ◽  
D T Su ◽  
J T Lin
Keyword(s):  
Computer Aided Design ◽  
Degrees Of Freedom ◽  
Fluid Dynamic ◽  
Wave Interaction ◽  
Six Degrees Of Freedom ◽  
Ship Model ◽  
Computer Aided ◽  
Cad Tool ◽  
Aided Design ◽  
Wave Incidence

This study establishes a relationship diagram of the ship-wave interaction under a ship advancing in waves. A finite difference method based on volume of fluid (VOF) principles was used to simulate the hydrodynamic motions of a ship advancing in waves. A ship model was constructed using a computer aided design (CAD) tool. The computational fluid dynamic (CFD) technique was used to calculate the hydrodynamic motions effect of a ship sailing in waves at varying angles of incidence. This study investigates a number of significant related parameters, such as the speed of the ship model, the various wave incidence angles, the wave height, and the navigation time. A chart is also used to show the flow field, and changes in the six degrees of freedom motion and continually compare changes in the drag force.

scholarly journals Smart Wireless Power Transfer Operated by Time-Modulated Arrays via a Two-Step Procedure

2015 ◽  
Vol 2015 ◽  
pp. 1-11 ◽  
Author(s):  
Diego Masotti ◽  
Alessandra Costanzo ◽  
Vittorio Rizzoli
Keyword(s):  
Computer Aided Design ◽  
Power Transmission ◽  
Transfer Performance ◽  
Wireless Power ◽  
Harmonic Radiation ◽  
Full Wave ◽  
Array Architecture ◽  
Step Procedure ◽  
Novel Method ◽  
Aided Design

The paper introduces a novel method for agile and precise wireless power transmission operated by a time-modulated array. The unique, almost real-time reconfiguration capability of these arrays is fully exploited by a two-step procedure: first, a two-element time-modulated subarray is used for localization of tagged sensors to be energized; the entire 16-element TMA then provides the power to the detected tags, by exploiting the fundamental and first-sideband harmonic radiation. An investigation on the best array architecture is carried out, showing the importance of the adopted nonlinear/full-wave computer-aided-design platform. Very promising simulated energy transfer performance of the entire nonlinear radiating system is demonstrated.

SPICE MODEL FOR COMPUTER-AIDED DESIGN OF BIOPOTENTIAL AMPLIFIER

2004 ◽  
Vol 16 (03) ◽  
pp. 151-156 ◽  
Author(s):  
YUN-LI LIU ◽  
DONG-LONG LIN ◽  
YUE-DER LIN
Keyword(s):  
Computer Aided Design ◽  
Electrode Impedance ◽  
External Interference ◽  
Proposed Model ◽  
Computer Aided ◽  
Biopotential Amplifier ◽  
Cad Tool ◽  
Power Line Interference ◽  
Aided Design ◽  
Distinct Features

There are many different kinds of biopotential signal. These signals are tiny in amplitude and the measurement is easily corrupted by external interference. For these reasons, the design of high-quality biopotential amplifier is usually an empirical task. To make the design of biopotential amplifier more efficient, this study proposes a simulation model for bioelectric signal measurement such that the design task can be achieved thoroughly by powerful computer-aided design (CAD) tool. The proposed model has two distinct features, one is the simulated biopotential signal is used for the genesis of biosignal, and the other one is the skin-electrode impedance is replaced by its corresponding equivalent circuit, which is a complex RC network. To verify the feasibility of the proposed model, an ECG amplifier is designed in Spice-related CAD tool and is implemented for ECG recording. From the results, the amplifier characteristics agree well between the simulated and the implemented circuit. Besides, the effect due to the commonly encountered power-line interference during biopotential measurement can be reasonably evaluated in the proposed model.

scholarly journals Mathematical software of CAD systems of facilities of industrial and transport infra-structure in timber industry

10.12737/3348 ◽  
2014 ◽  
Vol 4 (1) ◽  
pp. 75-80
Author(s):  
Данилов ◽  
Aleksandr Danilov ◽  
Афоничев ◽  
Dmitriy Afonichev ◽  
Петровский ◽  
...  
Keyword(s):  
Structural Design ◽  
Computer Aided Design ◽  
Transport Infrastructure ◽  
Optimal Placement ◽  
Mathematical Software ◽  
Timber Industry ◽  
Cad Systems ◽  
Computer Aided ◽  
Aided Design ◽  
The Brain

The mathematical software computer aided design (CAD) of objects of production and transport infrastructure in timber industry (TI) is given, feature of which is the following. Tasks of establishing the optimal placement options of spur road on felling and loading points along it are solved together. At the next stage, the structural design of collapsible coatings of spur roads and topping hair-pin bend is made, if such coating is provided. Depending on the characteristics of accepted structures of the brain and deep sections of spur roads its length in the cutting area.

A Computer-Aided Design Tool in Java for Planar Gripper Design

2004 ◽  
Vol 4 (1) ◽  
pp. 43-48 ◽  
Author(s):  
Mike Tao Zhang ◽  
Ken Goldberg
Keyword(s):  
Computational Efficiency ◽  
Computer Aided Design ◽  
Design Tool ◽  
Java Applet ◽  
Physical Experiments ◽  
Computer Aided ◽  
Cad Tool ◽  
Aluminum Part ◽  
Aided Design ◽  
Final Orientation

We describe an Internet-based CAD tool that automatically designs gripper jaws that will rotate a given rigid convex polygonal part from a selected stable resting orientation to a desired final orientation to facilitate insertion or assembly. In this paper we describe the CAD algorithm, its Java implementation, and improvements that relax input specifications and improve computational efficiency. We illustrate with physical experiments using a machined aluminum part and the resulting gripper as designed by the CAD tool. We also consider cases where a solution may not exist and derive a class of triangular parts that cannot be rotated with the planar grippers. The CAD tool, implemented as a Java applet, is available online at www.ieor.berkeley.edu/∼goldberg/sa-gripper/.

scholarly journals Computer Aided Design and Analysis of Tapping Tool with Diametrical flexibility

2017 ◽  
Vol 7 (2 (S)) ◽  
pp. 226
Author(s):  
Satish Bahale ◽  
Amit Shende
Keyword(s):  
Computer Aided Design ◽  
Metal Cutting ◽  
Longitudinal Axis ◽  
Rotational Energy ◽  
Machined Surface ◽  
Machine Shop ◽  
Computer Aided ◽  
Cutting Operation ◽  
Cad Tool ◽  
Aided Design

Tapping operation which refers to production of internal threads forms an integral part of any machine shop and it is intended to provide semi permanent fastening to the components of product so as to lend themselves for repairs and replacements. Though various methods of internal threading are available such as internal threading by milling, grinding or forming but internal threading by metal cutting which employs a tapping tool is indeed the mostly used for products where accuracy forms the base of evaluation. Last few decades have seen the growth of automobile industries and has resulted in development of its allied operations of which tapping is one of the crucial operation performed. The conventional tapping operation which surely involves rotating the tool and feeding past the pre drilled hole to create the contours called as internal threads and this is followed by withdrawal of tapping tool by reversing it with aid of rotational energy. The present paper attempts to design and analyze a tapping tool which will have no requirement of reversing of tool at the end of cutting operation which is essentially done by changing the design of conventional solid tap. The solid tapping tool is divided into two parts along the longitudinal axis and a mechanism is prompted to give the two parts actuation which would shrink at the end of cutting operation to be dragged out of hole without damaging the machined surface and providing the diametrical flexibility to engulf other diameters to be machined. This tapping tool with diametrical flexibility is designed in CAD tool named as CATIA V5 and efficiently analyzed by using FEA technique which is the working phenomenon for ANSYS.

scholarly journals A Novel CAD Tool for Electric Educational Diagrams

2019 ◽  
Vol 9 (4) ◽  
pp. 810
Author(s):  
Patricia Ruiz ◽  
Bernabé Dorronsoro
Keyword(s):  
Programming Language ◽  
Computer Aided Design ◽  
Assessment Tool ◽  
Systems Design ◽  
Graphical Interface ◽  
Electric Circuits ◽  
Self Evaluation ◽  
Cad Tool ◽  
Professional Systems ◽  
Aided Design

Computer-aided design (CAD) is a technological revolution, very powerful and with large applicability to problem solving. It is essential in many different disciplines ranging from architecture to education, medicine, physics, or gaming. In this work, we propose a novel CAD tool, called CADDi, to assist in the design of electric diagrams in the educational context. We are applying the theory of formal languages to create WDLang, an easy-to-use, highly expressive, unequivocal, and correct programming language for designing electric circuits. This programming language is the cornerstone of CADDi, which automatically generates the equivalent ladder diagram (explains the circuit operation) to the programmed circuit, offering additional features that allow analysis of its functionality in an interactive way. It also offers a graphical interface to directly design ladder diagrams, or to modify the automatically generated ones. The existing electrical CAD tools are either very simple, e.g., for creating good-looking diagrams with no functionality, or too complex, for professional systems design. CADDi is extremely useful for learning purposes. It assists users on how to generate ladder diagrams, and on understanding the behavior of electrical circuits. Additionally, it serves as an assessment tool for self-evaluation in the translation from wiring diagrams to ladder ones. In order to make CADDi highly accessible, it was implemented as a web page.

scholarly journals Logic Simulator:Sequential Logic Minimization

1994 ◽  
pp. 45-59
Author(s):  
Mohamed Othman ◽  
Bambang Sunaryo Suparjo
Keyword(s):  
Computer Aided Design ◽  
State Table ◽  
Logic Minimization ◽  
Computer Aided ◽  
Minimum Solution ◽  
Sequential Logic ◽  
Closure Function ◽  
Cad Tool ◽  
Aided Design

Computer Aided Design (CAD) is a tool that comprises of a program written in Turbo Pascal ver 5.0. This CAD tool is use to minimize the states of synchronous sequential logic automatically. In completely specified case, it will give a minimum solution but in the incomplete case, it does not guarantee to produce a minimum solution. Keywords: state-table, compatible tree, maximal compatible(MC), closure function.

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